Gordon,Shimmy is a by-product of one thing or the aggragate of my things. Plus size tire/wheelcombo's aggravate shimmy because the side wall ofthe tire is more rigid and therefore will vibrateat a frequency closer to the rest of the suspension. The reason that shimmy is elusive isbecause with these cars with their very precisesuspensions, pretty much everything has to be right...suspension component condition, assemblytorques, alignment (toe), and wheel balance/wheel trueness/tire roundness. If any one of thesefactors is out of spec, you increase the probability of shimmy.Sort through your suspension..not too hard..re-place components over 100K mi, and you will haveone of the best driving experiences there is.Good luck,George90 735il/145K

The front end of mine was like a rock for the first year ( I mean no shimmy not stiff or anything)...anyway, put on 17" wheels and had no trouble at all once I had put on the hubcentric rings... still smooth and solid. Then about 2 months ago I started to notice the shimmy at exactly 80-100KPH...55-64 MPH. Had it looked at and the lower control arms were both loose and the right shock was leaking (my shimmy seemed to be from the right). Would be interesting to know what exactly causes this one... the shock or the control arms (lower).